K 2500 Truck 4WD V8-305 5.0L VIN M SFI (1998)
1. Install the NEW upper intake manifold to lower intake manifold gasket (3) into the groove of the upper intake manifold (2).
2. Install the upper intake manifold (2) onto the lower intake manifold (6).
3. If reusing the fasteners, apply threadlock GM P/N 12345382 or equivalent to the threads of the upper intake manifold attaching studs (1).
Sequence
3. Install the upper intake manifold studs (1).
3.1.
Tighten the upper intake manifold studs on the first pass to 5 Nm (44 inch lbs.).
3.2.
Tighten the upper intake manifold studs on the second pass to 10 Nm (89 inch lbs.).
